test: Fix wallet_listdescriptors.py if bdb is not compiled

test/functional/wallet_listdescriptors.py

@@ -30,9 +30,10 @@ class ListDescriptorsTest(BitcoinTestFramework):
         node = self.nodes[0]
         assert_raises_rpc_error(-18, 'No wallet is loaded.', node.listdescriptors)
 
-        self.log.info('Test that the command is not available for legacy wallets.')
-        node.createwallet(wallet_name='w1', descriptors=False)
-        assert_raises_rpc_error(-4, 'listdescriptors is not available for non-descriptor wallets', node.listdescriptors)
+        if self.is_bdb_compiled():
+            self.log.info('Test that the command is not available for legacy wallets.')
+            node.createwallet(wallet_name='w1', descriptors=False)
+            assert_raises_rpc_error(-4, 'listdescriptors is not available for non-descriptor wallets', node.listdescriptors)
 
         self.log.info('Test the command for empty descriptors wallet.')
         node.createwallet(wallet_name='w2', blank=True, descriptors=True)